By Alvin Alexander. Last updated: April 1, 2017
This article on How to get out of a (mast cell disease) reaction cycle has good information on H1 and H2 antihistamines, mast cell stabilizers, and more.
(I already knew that the max dosage for Zyrtec for people like me is four pills a day, and on that page Lisa Klimas shares information on Benadryl, Zantac, Pepcid, and more.)